A. Labels must be located on the same surface of the package and near the proper shipping name marking, if the package dimensions are adequate. A label may be printed on or placed on a securely affixed tag, or may be affixed by other suitable means to a package that contains no radioactive material and has dimensions less than those of the required label; a cylinder; or, a package with an irregular surface upon which a label cannot be satisfactorily affixed. Labels representing subsidiary hazards must be displayed within 150 mm (6 inches) of the other required labels (§172.406(c)).